undefined ref to "_exit"

Hey, i had yagarto running on my vista 32Bit.

Now i have W7 64Bit and it dont want to run..

here the error code shown in console while try to compile a assembler 
file

...\Tutorien\RA\Praktika\termin3>arm-elf-gcc aufgabe1.S -o aufgabe1.elf
c:/program files 
(x86)/yagarto/bin/../lib/gcc/arm-elf/4.4.2/../../../../arm-elf/
lib\libc.a(lib_a-exit.o): In function `exit':
C:\msys\1.0\home\yagarto\newlib-build\arm-elf\newlib\libc\stdlib/../../. 
./../../
newlib-1.18.0/newlib/libc/stdlib/exit.c:65: undefined reference to 
`_exit'
collect2: ld returned 1 exit status


need help :)

greetz
Kai